Process for finishing seams of leather goods



Dec; 21 1926. 1,611,228

A. J. PRATT PROCESS FOR FINISHING SEAMS OF LEATHER GOODS Filed Augus 4. 1925 (lrrhurll P 011 attorney arm vented A ARTHUR; J,- i ianrr, or lementine can coivrPAnY, or SOU'IHBRID or MASSACHUSETTS risooiiss FOR E, iaassncrrusn'rrs, ASSIGNOB, TO AMERICAN orrL en, iviassecer isnrrs; A'VOLUN'IABY assocm'zroii riirisrr ive SEAIYIS, or LEATHER, Goons;

.fipplicatioii filed Au u ti;ieasmseriaiire/43,177. J i

This invention relates to a new and useful process for finishing the. seams of leather goods, and has particularrefereiice to the" finishing of eye lass and spectacle cases.

' Prior to the presentinvention it has been customary in the'inanufacture of cases "of the character stated, to

finish the seams "thereof either by burnishing thesanie by hand with an ordinary hand tool; or by means of a revolving burnishing wheel.

Both of these methods, however, necessitate the'unneces'sary expenditure of considerable time and labor, with the result that the cost of manufacturing these cases is somewhat increased.

It is, therefore, one of the principal objest-s of'the present invention to produce a process for finishing or burnishing of eyeglass and spectacle the seams cases which will cheapen the cost ofmanufacture of the same, and which will-overcorneall of the,

other disadvantages encounteredin the use of these former methods;

Another-object is .to provide process which consists of aniiniiriuin number of operations, all of which are extremely simple scam after 7 porting die or anvil;

rand easilyyper'forined,

Other objects and advantages ofthe present'improved'process will ily apparent from become more read the following description "when taken in connection withthe accomp'anying drawing, wherein has been dis= closed one way inwhich the method niay-bei performed; In thed a ppli cation v Figure l is a pers ished case; I

-Figure 2 is a View of a showingthe seam before Figure 3. is a sectional "awings, forminga partf'of this,

pective view of a finit is; finished view showing one way that inaryfbe employed for carrying-out iiy method, and show ng.

it has. been finished;.

Figure ijisa siini ar As an exaniplelof rny procedure, I first take a which have been stitched finished: seain between members, and then bring w th a heated plunger, 7

the finishing operation.

mproved the seams, of Q the seam; before view showing ino'de Y of case,

but have not been finished, andtlien place the case over a sup- '1 next clamp the un suitable. clamping into contactthe'reg which presses the portion of a case the, downwardly between. the clamping incinseam and burnishes the saine, whereby to form a finishedisurface, 1 i It isj'custornary to herein described and illustrated from a single length of-inaterial whichfisfoldedto provide front and rear sides and a cover portion, after which the adjacent ends of form cases of the type the two sides are stitched together and the Y rough jseains subsequently finished.

Referring particularly to Figure 1, I have disclosed 'afin'ished. case, which comprises front and rear sides 10 and 11, respectively,

the rear side. 11 of which is formed with example whereby my improved method may be accomplished, and certain apparatus which'inay be used in conjunction therewith.

1 portion 12. After the case, which and itis'th'e i V to forma.

This apparatus consistsof afsupporting die. or anv l l h a'gpair' of suitable clamping members 15, anda heated plungerlti, which plunger is formed-with a, reduced end-'17 i having a groove {18 iiithebottorn face'theree arranged to be imparted! to 1 the finished seani. l

. After the of,'th v approximate curvature of which is L" ,ends ofthe sides of the case .;'have been stitched together, the Said case is placed over ;the supportingfdie or anv l,

14 as shown in Figures clamped; and 3 held clamping 'rneinbers v 3 and i,- and' the unfinished ends of the sides are then firmly between the suitable 15'. ?While held in this position the heated" plunger 16 is lowered :and the reduced end 17 thereof passing bers. 15, engaging with/the unfinished 1 end edgexof the case, presses in' F-igure 4,." wherebyto form seam or surface.

urvature 'ff th gyCOVe the plungei I will be clearly understoodia's the v the same,- asshown' 1 afinished The curve .of the finishedsurface, will-be approximately equal to=the.

' l 18inthebottom of plunger is lowered it crushes the outer edges of the seam simultaneously throughout the length of the seam to a smooth and burreferred to the same as being particularly used in connection With spectacle or eye glass cases,it will, of course, he understood that it may be employed for finishing the seams of leather goods of any character to which it may beapplicable.

Having thus described my invention, I claim: r V

1. The process of making a smooth burnished seam ontwo pieces of leather held together, comprising securing two pieces of lecther together face to face, holding the seam portion securely, and pressing the e11 tire lengthof the outer edges of the seam simultaneously to a smooth burnished'surface. V ;V I 1 2. The process of making esmooth bur nished seam on a plurality of pieces'of leather held together, comprising crushing down the outer edges of the seam simultane- V c ously throughout the length of the seam toa'smooth surface. 7 7

3. The process of making a smooth bun nished surface'on the edge of it piece of leather, comprising crushing down thejouter edge of the piece of leather, simultaneously 7 tl'lroughout' its length to a smooth surface;

AR'l HUR J." PRATT; 

